Half a circle or an arc that is 180 degrees

In this question, we must find what is known as the half of a circle.

To find its answer, we must first draw a circle, and as we know, when a diameter passes through the centre and touches the two ends of a circle, only a circle divided into two parts exists.

A semicircle is a one-dimensional point group that makes up half of a circle.

A semicircle's full arc is always 180° (equivalent to radians or a half-turn).

It only has one symmetry line (reflection symmetry)